Filters in MusicIP

I have a filter set up which covers all the genres I want MusicIP to use when generating mixes. If I choose a seed track from one of the genres listed in the filter then the mix contains tracks from the required genres. I would expect that generating mixes from tracks with genres not specified in the filter would not be allowed but it is and a mix generated from one of these genres produces a mix of songs from only the genres outside the filter.
I don't really understand how filters work in MusicIP but I wasn't expecting that. Does anyone have any further insight into why this is happening?

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